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// Codility Bbinary Gap Test
function solution($N) {
// write your code in PHP5.5
$binaryNumber = decbin($N); // binary conversion of number
$trimmed = trim($binaryNumber, 0); // trim to remove trailing zeros
$binaryGap = explode("1",$trimmed); // explode
$binaryCount = array_map('strlen', $binaryGap);
return max($binaryCount); // returns the longest binary gap
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